Metallic window sash



March 18,1952 I R RATES 2,589,729

METALLIC WINDOW SASH Filed July '7, 1947 '//v v: NTOR. PA UL A; RA TES BY HIS ATTOENEKS.

HARRIS, K/L'Cl-LFOSTER & HARRIS 6y Patented Mar. 18, 1952 2,589,729 METALLIC WINDOW SASH Paul R. Rates, Sherman Oaks, Calif., assignor to Timm Industries, Inc., Glendale, Calif., a corporation of California Application July 7, 1947, Serial No. 759,379 Claims. (01.189-76) This invention relates generally to structural frames and particularly to improvements in metal Window sashes, doors and the like.

etal window sashes and like structural frames are used extensively in homes and industrial buildings and it is the usual practice to construct such frames from metal sections which are rolled from sheet stock into channel, angular and other forms, the intersecting ends of the sections being permanently connected by rivets, screws, or Welding. In an effort to produce sashes v hich would be sufiiciently light in weight to enable them to be readily slid in their supporting widowcasings, their sections have been made from relatively thin stock capable of being readily fabricated but which are apt to become distorted during use, thus causing looseness. It is therefore a particular object of my invention to provide a window sash which is composed of sections made from extruded, light weight metal such as aluminum alloy, and preferably the sections are of Z-shape in cross section so as to produce maximum strength and prevent bending or other distortion thereof.

In previous types of metal window sashes the intersecting ends of the sections thereof are usually connected by overlapping portions and this results in unsightly joints which are exposed to view and which detract from the a pearance of the window. It is therefore another object of the present invention to provide a metal window sash in which the intersecting ends of the sections of the sash are permanentl connected by rabbeted joints and welding so as to produce smooth, flush surfaces at the corner joints to enhance the appearance of the metal window and effect greater strength and rigidity.

Another object is to provide a metal window sash which is capable of being manufactured at comparatively low cost, the frame of the sash being composed of but four sections adapted for mass production from extruded metal and expeditious assembly without the use of special equipment for this purpose.

Further objects will appear from the following specification and the drawing, which is intended for the purpose of illustration only, and in which:

Fig. 1 is a perspective View of a metal window sash constructed in accordance with the present invention;

Fig. 2 is a oross-sectional view through one of the sections of the sash taken on line 2-2 of Fig. 1;

Fig. 3 is a perspective view of the adjoining rabbeted ends of two of the sections, illustrating the manner in which the rab eted ends are joined to provide a corner of the sash structure; and

Fig. 4 is a fragmentary perspective view of the sash structure, showing the rabbeted joint at a corner thereof.

Referring to the drawing in detail, the improved window sash 5 consists of four sections, namely, an upper horizontal rail 6, a lower horizontal rail 1 and a pair of side rails or stiles 8 and 9 connected between the corresponding ends of the upper and lower rails to provide a sash of rectangular configuration. Since the rail members 6 and l are identical, except in length, a description of one of these rails will suffice. Referring to Figs. 2 and 3, the upper rail 6 consists of a length of extruded metal which is Z-shaped in cross section, the railhaving an outer longitudinally extending vertical flange l I, an inner longitudinally extending vertical flange l2 and a horizontal connecting web l3 between the two flanges. The inner flange l2 and web 13 are of substantially the same length and are somewhat shorter than the outer flange H so that their ends are spaced inwardly from the ends of the outer flange. At the ends of the rail section 6, its outer flange H is rabbeted on the outer surface as shown at l 5, thereby providing tongues [6 of substantially one-half the thickness of the flange. The outer surface of the inner flange I2 is also rabbeted at its ends as shown at ['9 to provide tongues 20 of approximately one-half the thickness of this flange.

The vertical side sections or tiles 8 and 9 are of substantially the same construction as the upper and lower rail sections 6 and l and the side sections are identical in construction. As shown in Fig. 3, the section 8, illustrated by way of example, is mace from a Z-shap'ed metal extrusion to provide an outer longitudinally extending flange 22, an inner longitudinally extending flange 23 and a connecting web 24, the flange 23 and web 24 being shorter in length than the outer flange 22 to provide spaces at the ends of the section. The inner surface of the outer flange 22 is rabbeted at its ends as shown at 25, thus providing tongues 26 'of substantially onehalf the thickness of the flange. In a like manner, the inner surface of the inner flange 23 is rabbeted at its ends as indicated at 28 to provide tongues 29 of a thickness equal to substantially one-half the thickness of the flange; the rabbets 28 being cut through the connecting web 24.

The extruded metal sections in, 1, 8 and 9 are cut to the proper lengths necessary to produce a rectangular window sash of required 'dimensions and following this operation their ends are rabbeted as described above by a simple milling or planing operation. After the sections have been fabricated in this manner, the adjoining ends of a horizontal section and a vertical section, for example, the upper section or rail 6 and the side section or stile 8, are brought together in the manner indicated by dot-and-dash lines in Fig. 3. That is to say, the adjoining ends of these sections are slid together so as to cause the tongues l6 and 20 of the section 6 to enter the respective rabbets 25 and 28 of the section 8, and to dispose the tongues 26 and 29 of the section 8 in the respective rabbets l and I9 of the section 6. By this method of assembly, the several tongues I6, 20, 2S and 29 are arranged in juxtaposition as clearly shown in Fig. 4 so that the adjoining ends of the intersecting sections 6 and 8 are, in effect, interlocked. It will be noted that the end of the connecting web l3 of the section 6 overlies the upper extremity of the connecting web 24 of the side section 8 when the sections are interlocked. After the adjoining ends of the sections 6 and 8 have been assembled to provide the rabbeted joint shown in Fig. 4, they are permanently joined together, preferably by spot welds or rivets. 'As herein shown, the abutting tongues I 6 and 26 and the similar tongues 20 and 29 are spot welded as indicated at 32 and 33. respectively, and this operation may be conveniently and expeditiously performed in a conventional spot-welding machine. While the preceding method of assembly was limited to the joining of two specific sections, namely, 6 and 8, it will be understood that the other sections are connected in a like manner so as to produce the unitary rectangular sash structure illustrated in Fig. 1.

It wfll be observed by reference to'the drawing and from the foregoing description that when the various sections are connected by the rabbeted joints, the outer and inner surfaces are flush and the presence of unsightly projections or seams is entirely avoided so that the finished frame or sash appears to the casual observer as one which is made from a single piece of metal. Moreover, the improved sash is composed of members of Z-shaped cross section so that it is especially strong and will resist considerable strain, and thereby permanently retain its shape. The improved sash structure is particularly adapted for manufacture from extruded aluminum alloy so that it is rendered light in weight and this is a desirable feature since the complete window may be readily opened and closed without binding in its casing. Furthermore, the present improved sash is economical to manufacture and lends itself to mass production so that it can be sold at a price comparable with conventional metal sashes.

.While I have herein shown and described the improved window sash as embodied in a preferred form of construction, by way of example, it will be apparent that various changes might be made therein without departing from the spirit of the section; a lower section; and a pair of side sections connected between the corresponding ends of said upper and lower sections, all of said sections being substantially Z-shaped in cross section to provide an outer longitudinal flange, an inner longitudinal flange spaced from and of shorter length than said outer flange, and a connecting web joining said outer and inner flanges and of substantially the same length as said inner flange, each of said inner and outer flanges of all of said sections having rabbeted end portions interlocked, one with another, at the corners of the sash.

3. A structural sash, comprising: an upper rail section; a lower rail section; and a pair of stile sections connected between the ends of said upper and lower sections, all of said sections being substantially Z-shaped in cross section to invention. Therefore, without limiting myself in this respect, I wish to be afforded the full scope of the appended claims.

I claim as my invention:

1. A structural sash, comprisin an upper section; a lower section; and a pair of side sections extending between the corresponding ends of said upper and lower sections, all of said sections being substantially Z-shaped in cross section to provide an outer longitudinal flange, an inner longitudinal flange spaced from and of shorter length than said outer flange, and a connecting web joining said outer and inner flanges and of substantially the same length as said inner flange, each of said inner and outer flanges of all of said sections having end portions of reduced thickness interlocked, one with another, at the corners of the sash.

2. A structural sash, comprising: an upper provide an outer longitudinal flange, an inner longitudinal flange extending parallel to said outer flange with its ends spaced inwardly from the ends thereof, and a connecting web between said inner and outer flanges, each of said inner and outer flanges of all of said sections having rabbeted end portions interlocked, one with another, at the corners of the sash.

4. A structural sash, comprising: an upper rail section, a lower rail section; and a pair of stile sections connected between the ends of said upper and lower sections, all of said sections being substantially Z-shaped in cross section to provide an outer longitudinal flange, an inner longitudinal flange extending parallel to said outer flange with its ends spaced inwardly from the ends of the outer flange, and a connecting web between said inner and outer flanges, each end of said inner and outer flanges of all of said sections having a tongue and a rabbet, the tongues and rabbets of the corresponding flanges of intersecting sections interfitting at the corners of the sash with adjoining tongues in juxtaposition and the end of said connecting web of one section overlapping the corresponding end of said connecting web of an intersecting section.

5. A rectangular metallic frame, comprising four elongated sections joined at their ends to form the frame, each of said sections being substantially Z-shaped in cross section to provide an outer longitudinal flange, an inner longitudinal flange spaced from and shorter in length than said outer flange, and a connecting web joining said outer and inner flanges and of substantially the same length as said inner flange, each of said inner and outer flanges of all of said sections having rabbeted end portions providing longitudinally extending tongues each equal in thickness to substantially one-half the thickness of a said flange and interlocked, one with another, at the corners of the frame, and connected by welds.

PAUL R. RATES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 976,198 Merritt Nov. 22, 1910 2,113,959 Campbell Apr. 12, 1938 FOREIGN PATENTS Number Country Date 14,239 Great Britain 1912 

